A Closer View of the Writer's Museum
I failed to take a picture for some reason, but behind me at this point Kate showed us the outline of a stairway at the back of one of the medieval shops on the Royal Mile. We could make out the stone steps leading to the second floor, but in the middle of this series of steps was one over-sized step used as an early form of burglar alarm - when someone unfamiliar with his surroundings might be sneaking up or down these steps in the dark the suddenly different sized gradation would make him fall or stumble thus raising the alarm.